Non-capsizable recreation boat



April 12, 1960 B. K. DOBKOWITZ 2,932,040

NON-CAPSIZABLE RECREATION BOAT Filed July 22, 1957 INVENTOR BERN HARD KDOBKOWITZ B mn/Y/W AT TORN EYS 7 2,932,040 Noni-CAPSIZABL RECREATIONBOAT Bernard K. Dobkowitz, San Francisco, Calif.

Application July 22, 1957, Serial No. 673,282

1 Claim. (Cl. 9--3) The present invention relates to improvements in anon-capsizable recreation boat. It consists of the combinations,constructions and arrangement of parts, as hereinafter described andclaimed.

An object of my invention is to provide a non-capsizable boat having ashallow draft, and which is considerably smaller than a conventional rowboat, and that is made to support fully grown persons without tippingover or sinking, even though the occupants move to one section of theboat.

More specifically stated, I propose to provide a hull having a buoyantmember mounted on the exterior of a hull so as to provide a protectivefender around the latter,

this member being positioned to float in water when the boat is placedin a body of water. Moreover, the member is positioned so that when oneportion thereof is elevated above the water, due to tilting of the boat,the elevated portion will act as a counterweight tending to restore theboat to an even keel. At the same time, an opposite portion of themember, which is depressed into the water due to the tilting of theboat, is positioned so as to tend to raise that part of the boat onwhich the latter portion of the member is disposed.

Another object of this invention is to provide a noncapsizablerecreation boat, which is simple in construction, durable and efficientfor the purpose intended, and which may be manufactured at a relativelylow cost.

Other objects and advantages will appear as the specification continues,and the novel features will be set forth in the claim hereunto annexed.

Drawings For a better understanding of the invention, reference shouldbe had to the accompanying drawing, forming part of this specificationin which:

Figure 1 is a top plan view of my non-capsizable rec-, reation boat;

Figure 2 is a side elevational view thereof;

Figure 3 is a transverse sectional view taken along the line III-III ofFigure 1; and

Figure 4 is a view similar to Figure 3, but showing the boat as beingtilted due to shifting of the load to one side thereof.

While I have shown only the preferred form of my invention, it should beunderstood that various changes, or modifications, may be made withinthe scope of the appended claim without departing from the spiritthereof.

Detailed description,

In carrying my invention into practice, I provide a hull indicatedgenerally at A and defining a bow 10, opposite lateral sides 11 and 11a,a stern 12 and a bottom wall 13. The hull may be made of plywood orplastic, if desired, and a reinforcing trim strip 14 may surround thetop of the hull. As shown, the bottom wall 13 is made flat so that theboat will have a shallow draft. Of course, I do not wish to be limitedto any particular dimensions, but for the reasons hereinafter stated,the boat may be made 2,932,040 Patented Apr. .12, 1960 ICC considerablysmaller than an ordinaryrow boat. For example, I have found that a boat24" wide, 16" high, and 6' long, when a buoyant member B is added to theboat, will amply-support one fully grown person, without tipping over orsinking.

It will be noted that the buoyant member B is butted directly againstand mounted on the exterior of the hull to extend horizontally. andentirely around the latter. It is positioned adjacent to the bottom ofthe, boat so as to float in water C when the boat is placed in a bodytofwater on an even keel, as shown in Figures 2 and 3. This member servesas a protective fender for the hull when the boat strikes a wharf orother object. The member B may be made from 4" x 6" timbers (or theirequivalent).

As suggested by the arrow 15, the load may shift to one side of theboat, and thus the port side 11 will be elevated above the water C, dueto tilting of the boat. The elevated portion 16 of the member B will actas a counterweight tending to restore the boat to an even keel. Theopposite portion 17 of this member will be depressed into the water atthe starboard side of the boat due to the tilting, and it is positionedso as to tend to raise that part of the boat on which the latter portionof the member B is disposed. Obviously, when the load is shifted to theother side of the boat, the portion 16 will be depressed into the water,while the portion17 will be elevated; with the result of tending torestore the boat to an even keel. The same will be true, if the boatpitches in the water so that its bow 10 or its stem 12 is elevated.

It will be apparent that the member B extends entirely around the hullA, including the how 10, opposite lateral sides 11 and 11a, and thestern 12. As clearly shown in Figures 2, 3 and 4, the bottom wall 13 isfiat and projects outwardly beyond the bow, opposite lateral sides andthe stern. The member B rests directly on these outwardly projectingparts of the bottom wall for support thereby.

In Figure 1, I show a pair of adjustable seats 18, which are supportedon cleats 19 so that these seats may be removed. Also, Figures 1 and 2disclose a seat 20 for an infant, which is supported on cleats 21 so asto be removable. These seats may be disposed at any desired dis- 1 tancebelow the top of the hull.

It will be noted from Figures 2 and 3 that the opposite lateral sides1111a, the how 10 and the stem 12 extend upwardly at substantially rightangles to the flat bottom wall 13. The buoyant member B is rectangularin cross-section so as to fit into the angular junctions defined by theintersections of the outwardly projecting parts ofthe flat bottom wallwith the bow, lateral sides and stem of the hull.

I claim:

A non-capsizable recreation boat comprising:

(a) a hull defined by a bow, opposite lateral sides, a stern,

and a bottom wall,

(b) the width of the hull being narrow in relation to its length,

(c) elongated buoyant members of substantially square cross-sectionmounted on the lower exterior portions of the hull and extendingentirely therearound so as to add to the displacement of the boat,

(d) said buoyant members being positioned in abutting relationship withthe bottom wall so as to float in water when the boat is placed in abody of water on an even keel,

(e) said buoyant members serving as a protective fenders for theexterior of the hull,

(1) said buoyant members being solid and having the density of timber,and being further positioned so that when one portion thereof iselevated above the water,

' due to tilting of the boat, this elevated portion by its own weightwill serve as a counterweight tending to restore the boat to an evenkeel,

(g) said buoyant members also being positioned so that h n ne o on her ip e s d in th wate such depressed portion will tend to raise that partof the boat to which it is attached due to its buoyancy, (h) the heightof the hull being sufficient to preventthe boat from shipping water whena load in the boat is shifted to one side, (i) the bottom wall'beingflat so that the boat will have a shallow draft,

KI the said float bottom wall projecting outwardly be- 4 v yond the bow,opposite lateral sides and the stern, t o

' substantially the full extent of the buoyant members,

(k) said buoyant members resting directly on the upper surface of theoutwardly projecting parts of the flat bottom wall for support therebyand said projecting parts of the fiat-bottom serving as protection forthe lower surfaces of said buoyant members.

References Cited in the file of this patent UNITED STATES PATENTS Patentshould read as Corre UNITED STATES PATENT OFFICE CERTIFICATE OFCORRECTION Patent No. 2,932,040 April 12; 1960 Bernhard, K. Dobkow itzified that error appears in the above ing eerr'eetion and that the saidLetters cted below,

In the grant-,- lines 1 and 12 and in the heading to the ame 0f inventorfor "Bernard printed specification line 3 n K. Dobkowitz-M eachoneurrence read Bernhard K, Dobk-owitz (1 this' 13th day of September1960.

It is hereby Cert numbered patent requir Signed and seale (SEAL) Attest:KARL H. AXLINE ROBERT C. WATSON Attesting Officer Conmissioner ofPatents

